environment

#!/bin/bash

# Copyright 2021 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

if [ "${BASH_SOURCE-}" = "$0" ]; then
    echo -e "This script should be sourced, not run:\nsource $0" >&2
    exit 1
fi

# Exports environment variables needed by parts of this project.

# The following environment variables should already be set to appropriate
# values:
#   RADIANT_DIR (e.g. $HOME/lscc/radiant/2.2/bin/lin64)
#
# If RADIANT_DIR isn't set, then only simulation can be used.

HPS_ROOT=$(realpath "$(dirname "${BASH_SOURCE[0]}")")

RUSTC="$(which rustc)"
# handle the case where rustc is not yet installed
if [ -z "${RUSTC}" ]; then
  echo "rustc not found"
  RUST_DIR=""
else
  RUST_DIR=$(dirname "${RUSTC}")
fi
export HOSTPATH="${HPS_ROOT}/build/host"

export RUST_VERSION=stable

# We completely overwrite any existing PATH. This ensures that we're not getting
# things from unexpected places.
PATH="/usr/sbin:/usr/bin:/sbin:/bin"
PATH="${PATH}:${HPS_ROOT}/third_party/gn/out"
PATH="${PATH}:${HPS_ROOT}/third_party/installed/bin"
PATH="${PATH}:${RUST_DIR}"
PATH="${PATH}:${HOSTPATH}"
export PATH

# RADIANT_DIR is optionally defined
if [ -d "${RADIANT_DIR:-}" ]; then
    export PATH="${PATH}:${RADIANT_DIR}"
fi

# This speeds up recompilation of verilator generated code quit a bit.
export OBJCACHE=ccache
export CC="ccache gcc"

# We deliberately clear anything that may have already been in PYTHONPATH to
# prevent accidentally pulling in anything outside this project.
PYTHONPATH="${HPS_ROOT}/../../.."  # For chromite
PYTHONPATH="${PYTHONPATH}:${HPS_ROOT}/python"
for i in "${HPS_ROOT}/third_party/python"/*; do
    PYTHONPATH="${PYTHONPATH}:${i}"
done
export PYTHONPATH

# Explicitly set the RISCV toolchain path.
USER_BIN_DIR=$(realpath ~)/bin
export USER_BIN_DIR
RISCV_VER=riscv64-unknown-elf-gcc-8.3.0-2020.04.1-x86_64-linux-ubuntu14
export RISCV_DIR="${USER_BIN_DIR}/${RISCV_VER}/bin"
export PATH="${RISCV_DIR}:${PATH}"

# List of directories with Rust source
export HPS_RUST_DIRS=(
    mcu_rom
    mcu_rom/stm32g0_application
    mcu_rom/stage0
    mcu_rom/stage1
    mcu_rom/stm32g0_i2c_peripheral
)